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基于超声透射时差法的金属棒缺陷检测研究

仪器仪表学报 2016年第4期37卷 818-826页

作者：黄刚太原工业学院电子工程系太原030008

本文提出了一种基于超声透射时差法检测缺陷的方法。首先对超声探头的声场特性分析研究,完成回波信号的转换和调理;然后控制时间数字转换器,得到回波信号的时差值;将采集到的不同时差值进行算法分析,并用数字信息量化出缺陷值,最终转化... 详细信息

本文提出了一种基于超声透射时差法检测缺陷的方法。首先对超声探头的声场特性分析研究,完成回波信号的转换和调理;然后控制时间数字转换器,得到回波信号的时差值;将采集到的不同时差值进行算法分析,并用数字信息量化出缺陷值,最终转化为可视的二维数据图。通过设计的系统对黄铜棒进行缺陷检测,采集的回波信号时差值的分辨率可达125 ps,缺陷测量误差小于±0.01 mm,径向和轴向分辨率可达0.007°,最大测量直径30 mm。实验结果表明缺陷检测系统具有较高的稳定性、可靠性和灵敏度。

关键词：超声波透射时差法缺陷分辨率

Overcharge to Remove Cathode Passivation Layer for Reviving Failed Li–O_(2)Batteries

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CCS Chemistry 2023年第3期5卷 641-653页

作者： Kai Chen Dong-Yue Yang Jin Wang gang huang Xin-Bo Zhang State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022 School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026

Prolonging the lifetime of batteries is a long-term pursuit,and it is also one of the prerequisites for the practical application of ***,this endeavor is challenging for high-energy Li–O_(2)batteries due to their poor charge efficiency and cathode passivation-induced by-products ***,we demonstrated that overcharging Li–O_(2)batteries could facilitate the decomposition of accumulated residue products and revive the cathode;thus,the battery lifespan could be significantly *** long battery lifetime not only made full use of the Li anode but also enabled the battery to recycle in a safer way without the risk of firing and ***,overcharge could be used in Li–O_(2)batteries with high mass loading,high rate,and large *** overcharge strategy simplified the cathode regenerating procedures and realized system-level efficient use of battery components,thereby prolonging the life of Li–O_(2)batteries to meet the requirements of practical applications.

关键词： overcharge Li-O_(2)battery battery life revive battery failure mechanism

The Preparation and Properties of Starch Based Shape Memory Hydrogel

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Journal of Renewable Materials 2021年第8期9卷 1365-1376页

作者： Yangling Li Zhengrong Li Hui Yu gang huang Xiaopeng Pei Kun Xu Pixin Wang Ying Tan School of Textile Materials and Engineering Wuyi UniversityJiangmen529000China Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of ScienceChangchun130022China Wenzhou Institute University of Chinese Academy of SciencesWenzhou325001China

In this work,the–catechol and–thiol modified starch was prepared by the esterification and amino condensation reaction,then a fully starch based hydrogel was prepared via the thiol-catechol Michael addition *** starch hydrogel gained shape memory behaviors by coordinate with Fe^(3+)ions at alkaline condition.1H-NMR had been used to character the structure of the starch derivatives and its character *** hydrogel’s modulus had also been measured before and after coordinating with Fe^(3+)ions in linear area and the result showed that both the hydrogel’s storage modulus and loss modulus kept constant in linear area from 0.1 rad/s to 100 rad/s,which demonstrated a good network was formed inside the ***,the shape memory behaviors had been tested by changing the pH value in *** result showed that the hydrogel can keep its temporary shape in high pH condition and recover to its original state after the shaped hydrogel immersed into acidic *** hydrogel might have great application prospects in the field of biomedical and engineering.

关键词： Starch thiol-catechol Michael addition reaction shape memory

Simultaneous removal of cadmium and sulfamethoxazole from aqueous solution by rice straw biochar

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第7期14卷 640-649页

作者： Xuan HAN Cheng-feng LIANG Ting-qiang LI Kai WANG Hua-gang huang Xiao-e YANG Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health College of Environmental and Resource Sciences Zhejiang University School of Marine Sciences Ningbo University Tobacco Production Technology Center Bijie Tobacco Company of Guizhou Province

The simultaneous sorption behavior and characteristics of cadmium (Cd) and sulfamethoxazole (SMX) on rice straw biochar were investigated. Isotherms of Cd and SMX were well modeled by the Langmuir equation (R2 >0.95). The calculated maximum adsorption parameter (Q) of Cd was similar in single and binary systems (34129.69 and 35919.54 mg/kg, respectively). However, the Q of SMX in a binary system (9182.74 mg/kg) was much higher than that in a single system (1827.82 mg/kg). The presence of Cd significantly promoted the sorption of SMX on rice straw biochar. When the pH ranged from 3 to 7.5, the sorption of Cd had the characteristics of a parabola pattern with maximum adsorption at pH 5, while the adsorption quantity of SMX decreased with increasing pH, with maximum adsorption at pH 3. The amount of SMX adsorbed on biochar was positively correlated with the surface area of the biochar, and the maximum adsorption occurred with d 250 biochar (biochar with a diameter of 150-250 μm). Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) showed that the removal of Cd and SMX by rice straw biochar may be attributed to precipitation and the formation of surface complexes between Cd or SMX and carboxyl or hydroxyl groups. The results of this study indicate that rice straw biochar has the potential for simultaneous removal of Cd and SMX from co-contaminated water.

关键词： Biochar Rice straw Simultaneous sorption Cadmium (Cd) Sulfamethoxazole (SMX)

Self organizing optimization and phase transition in reinforcement learning minority game system

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Frontiers of physics 2024年第4期19卷 297-309页

作者： Si-Ping Zhang Jia-Qi Dong Hui-Yu Zhang Yi-Xuan Lü Jue Wang Zi-gang huang Key Laboratory of Biomedical Information Engineering of Ministry of Education Key Laboratory of Neuro-informatics&Rehabilitation Engineering of Ministry of Civil Affairsand Institute of Health and Rehabilitation ScienceSchool of Life Science and TechnologyXi’an Jiaotong UniversityXi’an 710049China Lanzhou Center for Theoretical Physics and Key Laboratory of Theoretical Physics of Gansu Province Lanzhou UniversityLanzhou 730000China

Whether the complex game system composed of a large number of artificial intelligence(AI)agents empowered with reinforcement learning can produce extremely favorable collective behaviors just through the way of agent self-exploration is a matter of practical *** this paper,we address this question by combining the typical theoretical model of resource allocation system,the minority game model,with reinforcement *** individual participating in the game is set to have a certain degree of intelligence based on reinforcement learning *** particular,we demonstrate that as AI agents gradually becomes familiar with the unknown environment and tries to provide optimal actions to maximize payoff,the whole system continues to approach the optimal state under certain parameter combinations,herding is effectively suppressed by an oscillating collective behavior which is a self-organizing pattern without any external *** interesting phenomenon is that a first-order phase transition is revealed based on some numerical results in our multi-agents system with reinforcement *** order to further understand the dynamic behavior of agent learning,we define and analyze the conversion path of belief mode,and find that the self-organizing condensation of belief modes appeared for the given trial and error rates in the AI ***,we provide a detection method for period-two oscillation collective pattern emergence based on the Kullback–Leibler divergence and give the parameter position where the period-two appears.

关键词： oscillatory evolution collective behaviors phase transition reinforcement learning minority game

Effect of co-existing organic compounds on adsorption of perfluorinated compounds onto carbon nanotubes

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Frontiers of Environmental Science & Engineering 2015年第5期9卷 784-792页

作者： Shubo DENG Yue BEI Xinyu LU Ziwen DU Bin WANG Yujue WANG Jun huang gang YU State Key Joint Laboratory of Environment Simulation and Pollution Control Beijing Key Laboratory for Control of Emerging Organic Contaminants School of Environment Tsinghua University Beijing 100084 China

Co-existing organic compounds may affect the adsorption of perfluorinated compounds （PFCs） and carbon nanotubes in aquatic environments. Adsorption of perfluorooctane sulfonate （PFOS）, perfluorooctane acid （PFOA）, perfluorobutane sulfonate （PFBS）, and perfluor- ohexane sulfonate （PFHxS） on the pristine multi-walled carbon nanotubes （MWCNTs-Pri）, carboxyl functionalized MWCNTs （MWCTNs-COOH）, and hydroxyl functiona- lized MWCNTs （MWCNTs-OH） in the presence of humic acid, 1-naphthol, phenol, and benzoic acid was studied. Adsorption kinetics of PFOS was described well by the pseudo-second-order model and the sorption equilibrium was almost reached within 24 h. The effect of co-existing organic compounds on PFOS adsorption followed the decreasing order of humic acid 〉 1-naphthol 〉 benzoic acid〉phenol. Adsorbed amounts of PFOS decreased significantly in the presence of co-existing or preloaded humic acid, and both adsorption energy and effective adsorption sites on the three MWCNTs decreased, resulting in the decrease of PFOS adsorption. With increasing pH, PFOS removal by three MWCNTs decreased in the presence of humic acid and phenol. The adsorbed amounts of different PFCs on the MWCNTs increased in the order ofPFBS 〈 PFHxS 〈 PFOA 〈 PFOS. The increase of both initial concentrations and the number of aromatic rings of co-existing organic compounds suppressed PFOS adsorption on the MWCNTs.

关键词： perfluorinated compounds carbon nanotubes,competitive adsorption humic acid perfluorooctane sulfo-nate (PFOS)

Characterizing and Detecting Gas-Inefficient Patterns in Smart Contracts

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Journal of Computer Science & Technology 2022年第1期37卷 67-82页

作者： Que-Ping Kong Zi-Yan Wang Yuan huang Xiang-Ping Chen Xiao-Cong Zhou Zi-Bin Zheng gang huang School of Computer Science and Engineering Sun Yat-sen UniversityGuangzhou 510006China School of Software Engineering Sun Yat-sen UniversityZhuhai 519082China Guangdong Key Laboratory for Big Data Analysis and Simulation of Public Opinion School of Communication and DesignSun Yat-sen UniversityGuangzhou 510006China Peking University Shenzhen Graduate School Shenzhen 518000China

Ethereum blockchain is a new internetware with tens of millions of smart contracts running on *** from general programs,smart contracts are decentralized,tamper-resistant and permanently ***,to avoid resource abuse,Ethereum charges users for deploying and invoking smart contracts according to the size of contract and the operations executed by *** is necessary to optimize smart contracts to save ***,since developers are not familiar with the operating environment of smart contracts(i.e.,Ethereum virtual machine)or do not pay attention to resource consumption during development,there are many optimization opportunities for smart *** fill this gap,this paper defines six gas-inefficient patterns from more than 25,000 posts and proposes an optimization approach at the source code level to let users know clearly where the contract is *** evaluate the prevalence and economic benefits of gas-inefficient patterns,this paper conducts an empirical study on more than 160,000 real smart *** promising experimental results demonstrate that 52.75%of contracts contain at least one gas-inefficient pattern proposed in this *** these patterns are removed from the contract,at least 0.30 can be saved per contract.

关键词： smart contract anti-pattern detection optimization empirical study

Effects of baicalin in CD4 + CD29 + T cell subsets of ulcerative colitis patients

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World Journal of Gastroenterology 2014年第41期20卷 15299-15309页

作者： Feng-Yan Yu Shao-gang huang Hai-Yan Zhang Hua Ye Hong-gang Chi Ying Zou Ru-Xi Lv Xue-Bao Zheng Traditional Chinese Medicine Institute Guangdong Medical College Guangdong Provincial Hospital of University City Branch Traditional Chinese Medicine Institute Guangdong Medical College Guangdong Key Laboratory of Natural Medicine Research and Development School of Traditional Chinese Medicine of Southern Medical College

AIM: To evaluate the role of baicalin in ulcerative colitis (UC) with regard to the CD4+CD29+ T helper cell, its surface markers and serum inflammatory cytokines.

关键词： Ulcerative colitis Baicalin CD4+CD29+ Cytokines Nuclear factor-κ B

Comparison of 5-hydroxytryptophan signaling pathway characteristics in diarrhea-predominant irritable bowel syndrome and ulcerative colitis

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World Journal of Gastroenterology 2016年第12期22卷 3451-3459页

作者： Feng-Yan Yu Shao-gang huang Hai-Yan Zhang Hua Ye Hong-gang Chi Ying Zou Ru-Xi Lv Xue-Bao Zheng Traditional Chinese Medicine Institute Guangdong Medical University Dongguan 524023 Guangdong Province China University City Branch Hospital of Guangdong Provincial Hospital of Traditional Chinese Medicine Guangzhou 510006 Guangdong Province China Guangdong Key Laboratory of Natural Medicine Research and Development Guangdong Medical College Zhanjiang 524023 Guangdong Province China

AIM: To study differences in the visceral sensitivity of the colonic mucosa between patients with diarrheapredominant irritable bowel syndrome(IBS-D) and those with ulcerative colitis(UC) in remission and to relate these differences with changes in the 5-hydroxytryptophan(5-HT) signaling pathway. METHODS: Gastrointestinal symptoms were used to determine the clinical symptom scores and rectal visceral sensitivity of patients with IBS-D and patients with UC in remission. Blood levels of 5-HT and5-hydroxyindoleacetic acid(5-HIAA) were measured using an HPLC-electrochemical detection system. The levels of 5-HT 3 receptor(3R), 4R, and 7R m RNAs in colonic biopsy samples were detected using reverse transcription-polymerase chain reaction. The protein expression of TPH1 was analyzed by Western blot and ***: Abdominal pain or discomfort, stool frequency, and the scores of these symptoms in combination with gastrointestinal symptoms were higher in the IBS-D and UC groups than in the control groups. However, no significant differences were observed between the IBS-D and UC remission groups. With respect to rectal visceral sensitivity, the UC remission and IBS-D groups showed a decrease in the initial perception threshold, defecating threshold and pain threshold. However, these groups exhibited significantly increased anorectal relaxation pressure. Tests examining the main indicators of the 5-HT signaling pathway showed that the plasma 5-HT levels, 5-HIAA concentrations, TPH1 expression in the colonic mucosa, and 5-HT3 R and 5-HT5 R expression were increased in both the IBS-D and the UC remission groups; no increases were observed with respect to 5-HT7 R ***: The IBS-D and UC groups showed similar clinical symptom scores, visceral sensitivity, and levels of serotonin signaling pathway indicators in the plasma and colonic mucosa. However, the pain threshold and 5-HT7 R expression in the colonic mucosa were significantly different betwe

关键词： Stomach type diarrhea Diarrhea-predominant irritable bowel syndrome Ulcerative colitis in remission 5-Hydroxytryptophan